The army that was responsible for the operation of Unit 731 is the Imperial Japanese Army. This unit was a covert biological and chemical warfare research and development unit.
Unit 731 look it up.
Unit 731
A place to start might be Hal Gold's book Unit 731 Testimony It is available on Amazon. A Google search for "Unit 731" will provide a large number of sites and references, but their usefulness and accuracy is undetermined.
Unit 731
1, 17, 43, 731.
731/1
The Rape of Nanking , the Bataan Death March , medical experiments conducted by the infamous Unit 731 , etc . . .
7.31 = 731/100 = 731/100
369
0.0588
5.3358
There are 100 centimetres in one metre. Therefore, 731 centimetres is equal to 731/100 = 7.31 metres.